Atomic-Scale Visualization of Quasiparticle Interference on a Type-II Weyl Semimetal Surface

Zheng, Hao; Bian, Guang; Chang, Guoqing; Lu, Hong; Xu, Su-Yang; Wang, Guangqiang; Chang, Tay-Rong; Zhang, Songtian; Belopolski, Ilya; Alidoust, Nasser; Sanchez, Daniel S.; Song, Fengqi; Jeng, Horng-Tay; Yao, Nan; Bansil, Arun; Jia, Shuang; Lin, Hsin; Hasan, M. Zahid

doi:10.1103/physrevlett.117.266804

Title: Atomic-Scale Visualization of Quasiparticle Interference on a Type-II Weyl Semimetal Surface

Journal Article · Fri Dec 23 00:00:00 EST 2016 · Physical Review Letters

DOI:https://doi.org/10.1103/physrevlett.117.266804· OSTI ID:1536463

Zheng, Hao ^[1]; Bian, Guang ^[1]; Chang, Guoqing ^[2]; Lu, Hong ^[3]; Xu, Su-Yang ^[1]; Wang, Guangqiang ^[3]; Chang, Tay-Rong ^[4]; Zhang, Songtian ^[1]; Belopolski, Ilya ^[1]; Alidoust, Nasser ^[1]; Sanchez, Daniel S. ^[1]; Song, Fengqi ^[5]; Jeng, Horng-Tay ^[6]; Yao, Nan ^[1]; Bansil, Arun ^[7]; Jia, Shuang ^[8]; Lin, Hsin ^[2]; Hasan, M. Zahid ^[1]

Princeton University, NJ (United States)
National University of Singapore (Singapore)
Peking University, Beijing (China)
National Tsing Hua University, Hsinchu (Taiwan)
Nanjing University (China)
National Tsing Hua University, Hsinchu (Taiwan); Institute of Physics, Academia Sinica, Taipei (Taiwan)
Northeastern University, Boston, MA (United States)
Peking University, Beijing (China); Collaborative Innovation Center of Quantum Matter, Beijing (China)

Here we combine quasiparticle interference simulation (theory) and atomic resolution scanning tunneling spectromicroscopy (experiment) to visualize the interference patterns on a type-II Weyl semimetal Mo_xW_1-xTe₂ for the first time. Our simulation based on first-principles band topology theoretically reveals the surface electron scattering behavior. We identify the topological Fermi arc states and reveal the scattering properties of the surface states in Mo_0.66W_0.34Te₂. In addition, our result reveals an experimental signature of the topology via the interconnectivity of bulk and surface states, which is essential for understanding the unusual nature of this material.

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Research Organization:: Northeastern Univ., Boston, MA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); Gordon and Betty Moore Foundations; National Science Foundation (NSF); National Natural Science Foundation of China (NSFC); National Research Foundation; National Basic Research Program of China; Ministry of Science and Technology, Academia Sinica; National Tsing Hus University; National Key Projects for Basic Research of China

Grant/Contract Number:: FG02-07ER46352; AC02-05CH11231; GBMF4547; NSFDMR-1006492; 11674226; NRFNRFF2013-03; 2013CB921901; 2014CB239302; DMR-1420541; 2013CB922103; 91421109; 11134005; 11522432

OSTI ID:: 1536463

Alternate ID(s):: OSTI ID: 1337446

Journal Information:: Physical Review Letters, Vol. 117, Issue 26; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 52 works

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Author Correction: Signatures of the topological s+− superconducting order parameter in the type-II Weyl semimetal T d -MoTe2 Guguchia, Z.; von Rohr, F.; Shermadini, Z. Nature Communications, Vol. 9, Issue 1 https://doi.org/10.1038/s41467-017-02460-w	journal	January 2018
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Quasiparticle Interference Evidence of the Topological Fermi Arc States in Chiral Fermionic Semimetal CoSi Yuan, Qian-Qian; Zhou, Liqin; Rao, Zhi-Cheng arXiv https://doi.org/10.48550/arxiv.2002.08647	text	January 2020

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